The goal of the OOMMF project in ITL/NIST is to develop a portable,
extensible public domain micromagnetic program and associated tools.
This code will form a completely functional micromagnetics package,
but will also have a well documented, flexible programmer's interface
so that people developing new code can swap their own code in and out
as desired.

In order to allow a programmer not familiar with the code as a whole
to add modifications and new functionality, we feel that an object
oriented approach is critical, and have settled on C++ as a good
compromise with respect to availability, functionality, and
portability. In order to allow the code to run on a wide variety of
systems, we are writing the interface and glue code in Tcl/Tk. This enables our code to
operate across a wide range of Unix platforms, Windows NT, and Windows
95/98.

The code may be modified at 3 distinct levels. At the top level,
individual programs interact via well defined protocols across network
sockets. One may connect these modules together in various ways from
the user interface, and new modules speaking the same protocol can be
transparently added. The second level of modification is at the
Tcl/Tk script level. Some modules allow Tcl/Tk script to be imported
and executed at run time, and the top level scripts are relatively
easy to modify or replace. At the lowest level, the C++ source is
provided.

The first portion of OOMMF released was a magnetization file display
program called mmDisp. This is now
one part of the complete OOMMF project,
which includes a problem editor, a micromagnetic solver, and several
display widgets. A presentation and demo of OOMMF was made at the
1998 Joint MMM-Intermag conference (San Francisco, January 6-9).
The viewgraphs from this presentation are available in the following
formats:

The original OOMMF solver, mmsolve2D, is based on a micromagnetic code
that Mike Donahue and Bob McMichael had previously
developed. It utilizes a Landau-Lifshitz ODE solver to relax 3D spins
on a 2D square mesh, using FFT's to compute the self-magnetostatic
(demag) field. Anisotropy, applied field and initial magnetization
can be varied pointwise, and arbitrary shaped elements can be modeled.
A new, fully 3D solver, Oxsii, is under development. It was first
demonstrated at the OOMMF Workshop 2000,
held at NIST/Gaithersburg MD, on 18-August-2000. See the OOMMF Roadmap for details of the various
releases.

If you want to receive email notification of updates to this
project, register your email address with the "muMAG Announcement"
mailing list: